The primary cause of slow and unreliable WiFi is overcrowding. In your home, all of your (and your neighbor’s) WiFi devices compete to use the same radio airways, and if you see 5 or more WiFi neighbors you have bad congestion. It’s like trying to drive during rush hour. Your WiFi is in a traffic jam.
Unlike other WiFi networks Portal uses four exclusive FastLanes™ - these lanes are like carpool HOV or FasTrak lanes which let you speed past your neighborhood when everyone is streaming videos or gaming at the same time.